A Class 1 operator solves problems in two steps. A Class 2 operator solves them in three — adding a full hydraulic calculation (Manning's Equation) to the geometry and unit-conversion skills you already have, and applying that same three-step discipline to wet well fill-time and force main head problems you'll see in the field every week.
From Two Steps to Three
At Class 1 you chained a geometry step to a conversion or rate step. At Class 2, most real problems need a third link: compute the pipe's hydraulic geometry, apply Manning's Equation to get velocity, then use that velocity to get flow — or compute a volume, convert units, then divide by a rate. The formulas themselves aren't new; what's new is holding three steps in your head (or on scratch paper) without losing track of units.
Manning's Equation for Pipes Flowing Full
Manning's Equation is the standard tool for relatin